16 The Philippine Journal of Science 1917 
TABLE 8.—Eaperiments showing assimilation at temperatures between 15° 
C. and 40° C. (Matthaei, Table XI.) 
A t aeilation. 
2 pparen ira-| _™ 
Experiment No. Date. bobo Noman Area. eae ton per nei ang 
ture. | ty. hour. hour. | om. and 1 
hour. 
1903. Sq. cm.| Grams. | Grams Grams. 
00 1 CIR ears 
$s fee BU Apr.6 | 15.0 ESV oto eal ie as 
ee eres eee ed 
8 pena Ei Sedat, BS 
0.00485 | 90.00035 | 0.00705 
Sy ae ees Da 
_ S SRee Se 
LV «patie eaeantecatia Apr. 4 23.7 26} 42.0 | can oo oe 
Sr CON {eS ee 
a 30.0076 | 30.0009 | 20.0101 
pa es Rees 0.0157 
ic Be Spire pens “acl nope 
BVI osc uesddecasi wandering ‘Apr.3 | 30.5 45} 46.0 [sas Sfteseh, Teme ee 
Dn eee ee eee 
0.01135 | 20,00115 | 30,0136 
oh tae ee ail 0.0287 
0.0106 ; 
Tk ee ee es Apr.7 | 37.5 45| 36.0 fe 3 
0.0059 |... 
20.0100 | 20.0019 | 0.0163 
O.00e. f22a77 AL: 0.0149 
C00 biccce soilfac si nto ts 
CS Se eee Apr.9 | 40.5 45) 38.5 fe SROk aes 
4S ee pra Coad Pron 
20.0063 | 20,0016 | 90.0102 
® Mean values per hour. 
In Table 9 the two experiments are compared. In experi- 
ment 37 the temperature is lower and the light less intense than 
in experiment 56, while the assimilation is slightly greater. 
The difference in temperature between these two experiments 
would, according to Matthaei’s final curve, account for an 
increase in assimilation from 48 to 70 milligrams of carbon 
dioxide. Then, according to Matthaei’s argument (p. 79), if the . 
leaf were “exposed to nearly twice the light necessary for the — 
assimilation which it has actually performed,” it was also © 
exposed to a higher temperature than was necessary for this 
assimilation. Obviously, the only conclusion that can be drawn 
from a comparison of these experiments is that the leaf used 
in experiment 56, performed in April, was less active than the 
one used in experiment 37, done in March. : 
